"circle of Willis" meaning in English

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  "etymology_text": "Named after English physician Thomas Willis (1621–1675).",
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      "form": "circles of Willis",
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      "glosses": [
        "A circle of arteries at the base of the brain that is formed by the cerebral and communicating arteries and is a site of aneurysms."
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        "(anatomy) A circle of arteries at the base of the brain that is formed by the cerebral and communicating arteries and is a site of aneurysms."
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        {
          "word": "Willis circle"
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  "word": "circle of Willis"
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        "A circle of arteries at the base of the brain that is formed by the cerebral and communicating arteries and is a site of aneurysms."
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